Check These Things over before Buying Your Own Valves
- Oct 12, 2024
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Presumed that you are in need of a valve, do you know about how to determine the exact valve you are going to order? There are several things you have to consid
Five types of the valve sealing
- Oct 12, 2024
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The valve sealing face is composed of a valve seat and a closing member. The sealing surface on the valve seat and the closing member is tightly contacted or th
The differences between soft seal and hard seal of butterfly valves
- Oct 12, 2024
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For butterfly valves, hard seal means that both sides of the seal are made of metal material or other hard materials. The sealing performance of this seal is po
Features of Ball Valve
- Oct 12, 2024
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The main features of the ball valve are their compact structure, reliable seal, simple structure, easy to repair. The sealing surface and the spherical surface
Valves fire resistance test
- Oct 12, 2024
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The petrochemical industry is one of the pillar industries of the national economy. Its production process is complex, and the raw materials, semi-finished prod
Opening of DERVOS INTEGRATION CENTER
- Oct 12, 2024
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On Oct. 29th, a big opening ceremony of Dervos Integration Center was held in Lishui, Zhejiang. We invited our important customers to share this happy moment.
What is a foot valve?
- Oct 12, 2024
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Foot valve, also called bottom valve, belongs to a type of check valve. Different from other valves, a foot valve has a larger flow area than the pipe size, whi
The relation between Valve Size and Medium Flow Velocity
- Oct 12, 2024
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1. The flow rate and flow velocity of the valve mainly depend on the diameter of the valve and the resistance of the structure of the valve to the medium. At
Brief introduction of V-TYPE BALL VALVE
- Oct 12, 2024
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V-type ball valve is a kind of ball valve. Its closing part is a V-shaped opening on the ball. The V-shaped opening has a sharp edge. During the rotation of the
Single Piston Effect and Double Piston Effect Seats of Ball Valves
- Oct 12, 2024
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SPE (Single Piston Effect) seats are usually called self-relieving seats. Trunnion mounted ball valves with SPE seats are able to release over-pressure in cav
Dervos Valves in ECO FUEL INNOVATION PROJECT
- Oct 12, 2024
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In 2017, we supplied 136 pcs of valves for the ECO FUEL INNOVATION PROJECT. This is a testing project of converting oil-wood chip to diesel, and Dervos is proud
Briefing for Radiographic Testing
- Oct 12, 2024
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Sometimes we will have orders requesting for Radiographic Testing (RT), say for API 600 Gate Valves, Butt-weld Ends, 8”, 2500 LB, as it will be applied in